VIIRS (NOAA 21) I Band 375 m Active Fire Product NRT (Vector data)

Near real-time (NRT) NOAA-21 Visible Infrared Imaging Radiometer Suite (VIIRS) Active Fire detection product is based on that instrument's 375 m nominal resolution data. Compared to other coarser resolution (≥1km) satellite fire detection products, the improved 375 m data provide greater response over fires of relatively small areas, as well as improved mapping of large fire perimeters. Consequently, the data are well suited for use in support of fire management (e.g., near real-time alert systems), as well as other science applications requiring improved fire mapping fidelity. The 375 m product complements the baseline N21/VIIRS 750 m active fire detection and characterization data, which was originally designed to provide continuity to the existing 1 km Earth Observing System Moderate Resolution Imaging Spectroradiometer (EOS/MODIS) active fire data record. Due to frequent data saturation issues, the current 375 m fire product provides detection information only with no sub-pixel fire characterization.

VJ214IMGTDL_NRT are available through NASA FIRMS in the following formats: TXT, SHP, KML, WMS. These data are also provided through the LANCE FIRMS Fire Email Alerts. Please note only the TXT and SHP files contain all the attributes.

近实时（NRT）NOAA-21可见光红外成像仪（VIIRS）主动火灾检测产品基于该仪器375米标准分辨率的数据。与其它更高分辨率的（≥1公里）卫星火灾检测产品相比，改进的375米数据在相对较小面积的火灾响应方面提供了更佳的表现，同时亦优化了大型火灾边界的描绘。因此，这些数据非常适合用于支持火灾管理（例如，近实时警报系统）以及其他需要提升火灾映射精度的科学应用。375米产品与基线N21/VIIRS 750米主动火灾检测和特征数据相辅相成，后者最初设计旨在延续现有的1公里地球观测系统中等分辨率成像光谱仪（EOS/MODIS）主动火灾数据记录。鉴于数据饱和问题频发，当前375米火灾产品仅提供检测信息，而不包含亚像素级的火灾特征。VJ214IMGTDL_NRT数据可通过NASA FIRMS以TXT、SHP、KML、WMS格式获取。这些数据亦可通过LANCE FIRMS火灾电子邮件警报提供。请注意，仅TXT和SHP文件包含所有属性。